Real-time holographic quantitative measurement of vapor density distribution of suspended droplets

摘要

We applied digital holography (DH) technology in a quantitative measurement of the density distribution of a low refractive index transparent substance (e.g., the vapor of suspended droplets). An optical setup was built based on the Mach-Zehnder interferometer. A measurement performance test showed the mean relative error of the measurement error was about 2.0%; that of the environment disturbance error was about 0.47%. By a quantitative method to assess the precision limit, the temperature measurement precision could achieve 0.01 degrees C, and the vapor density measurement precision could achieve 0.0001 kg/m(3). We believe that all the benefits above make the setup a good choice for application in the Chinese space station. (C) 2021 Optical Society of America